Add abandon script from nova

This adds the abandon_old_reviews.sh from the nova repository into
Neutron. This is handy for cleaning up the neutron review queues
by abandoning stale reviews stuck in the queue with a helpful
message.

Change-Id: I8920123217cb134c792dee35a5b06abde31be1d4

tools/abandon_old_reviews.sh

@@ -0,0 +1,87 @@
+#!/bin/bash
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+#
+# WARNING!
+# Please do not run this script without talking to the Neutron PTL. Auto
+# abandoning people's changes is a good thing, but must be done with care.
+#
+# before you run this modify your .ssh/config to create a
+# review.openstack.org entry:
+#
+#   Host review.openstack.org
+#   User <yourgerritusername>
+#   Port 29418
+#
+
+# Note: due to gerrit bug somewhere, this double posts messages. :(
+
+# first purge the all reviews that are more than 4w old and blocked by a core -2
+
+set -o errexit
+
+function abandon_review {
+    local gitid=$1
+    shift
+    local msg=$@
+    echo "Abandoning $gitid"
+    # echo ssh review.openstack.org gerrit review $gitid --abandon --message \"$msg\"
+    ssh review.openstack.org gerrit review $gitid --abandon --message \"$msg\"
+}
+
+PROJECTS="(project:openstack/neutron OR project:openstack/neutron-fwaas OR \
+           project:openstack/neutron-lbaas OR project:openstack/neutron-vpnaas OR \
+           project:openstack/python-neutronclient OR project:openstack/neutron-specs)"
+
+blocked_reviews=$(ssh review.openstack.org "gerrit query --current-patch-set --format json $PROJECTS status:open age:4w label:Code-Review<=-2" | jq .currentPatchSet.revision | grep -v null | sed 's/"//g')
+
+blocked_msg=$(cat <<EOF
+
+This review is > 4 weeks without comment and currently blocked by a
+core reviewer with a -2. We are abandoning this for now.
+
+Feel free to reactivate the review by pressing the restore button and
+contacting the reviewer with the -2 on this review to ensure you
+address their concerns.
+
+EOF
+)
+
+# For testing, put in a git rev of something you own and uncomment
+# blocked_reviews="b6c4218ae4d75b86c33fa3d37c27bc23b46b6f0f"
+
+for review in $blocked_reviews; do
+    # echo ssh review.openstack.org gerrit review $review --abandon --message \"$msg\"
+    echo "Blocked review $review"
+    abandon_review $review $blocked_msg
+done
+
+# then purge all the reviews that are > 4w with no changes and Jenkins has -1ed
+
+failing_reviews=$(ssh review.openstack.org "gerrit query  --current-patch-set --format json $PROJECTS status:open age:4w NOT label:Verified>=1,jenkins" | jq .currentPatchSet.revision | grep -v null | sed 's/"//g')
+
+failing_msg=$(cat <<EOF
+
+This review is > 4 weeks without comment, and failed Jenkins the last
+time it was checked. We are abandoning this for now.
+
+Feel free to reactivate the review by pressing the restore button and
+leaving a 'recheck' comment to get fresh test results.
+
+EOF
+)
+
+for review in $failing_reviews; do
+    echo "Failing review $review"
+    abandon_review $review $failing_msg
+done

tools/misc-sanity-checks.sh

@@ -32,7 +32,7 @@ check_opinionated_shell () {
     # If you cannot avoid the use of bash, please change the EXPECTED var below.
     OBSERVED=$(grep -E '^([[:space:]]*[^#[:space:]]|#!).*bash' \
                tox.ini tools/* | wc -l)
-    EXPECTED=3
+    EXPECTED=4
     if [ ${EXPECTED} -ne ${OBSERVED} ]; then
         echo "Bash usage has been detected!" >>$FAILURES
     fi